IBM CORPORATION

AT-TURBO 286

Processor              80286
Processor Speed        6/8/10MHz
Chip Set               Unidentified
Video Chip Set         None
Maximum Onboard Memory 1MB
Maximum Video Memory   None
Cache                  None
BIOS                   Unidentified
Dimensions             355mm x 304mm
I/O Options            None
NPU Options            80287

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Speaker                     J19      External battery            J21

  Power LED & keylock         J20      Reset switch                J24

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

  »   Factory configured - do not           J23          Unidentified
      alter (wait state select)

      Monitor type select color             SW1       Pins 2 & 3 closed

      Monitor type select monochrome        SW1       Pins 1 & 2 closed

      BIOS type select 27128                U57        Pins 1 & 8, 2 & 7
                                                            closed

      BIOS type select 27256                U57        Pins 3 & 6, 4 & 5
                                                            closed

                            DRAM CONFIGURATION

     Size                 Type                 Bank 0          Bank 1

    512KB                 512KB               (9) 41256         None

    640KB                 640KB               (9) 41256       (9) 4164

     1MB           640KB internal/384KB       (9) 41256       (9) 41256
                        expansion

     1MB           512KB internal/512KB       (9) 41256       (9) 41256
                        expansion

                  DRAM JUMPER CONFIGURATION

        Size                 J17                  J18

        512KB          Pins 2 & 3 closed   Pins 2 & 3 closed

        640KB          Pins 1 & 2 closed   Pins 2 & 3 closed

         1MB           Pins 1 & 2 closed   Pins 1 & 2 closed

         1MB           Pins 2 & 3 closed   Pins 1 & 2 closed

           CPU SPEED SELECTION

        Speed                J25

        6MHz          Pins 2 & 3 closed

        8MHz          Pins 1 & 2 closed

        10MHz         Pins 1 & 2 closed